This Williams gas conversion kit is engineered for specific compatibility with Williams 50086 series dual-wall counterflow furnaces manufactured after 2013

while the 37K6301 is often used for individual retail packaging

This ensures the thermostatic probe is positioned correctly within the top 6 inches of the tank to accurately sense water temperature

This Lennox 17F21 is typically supplied as the box assembly

Siemens Building Technology GMA121.1P Actuator 30067439-890 This Williams gas conversion kitThe Siemens GMA121. 1P is a heavy duty OpenAir electronic damper actuator designed for the rigorous demands of commercial HVAC systems. Engineering for reliability, this 24V spring return actuator delivers 62 lb in torque (7 Nm), making it an ideal choice for managing return air, exhaust, and face and bypass dampers in both constant and variable air volume (VAV) installations. The 2 position control (on off) logic ensures decisive operation, while the